Table 1.

General characteristics of study participants across quartiles of energy-adjusted dietary fiber intake (n = 3,362)^a.

	Quartiles of energy-adjusted dietary fiber intake
	(n = 840) (<19 g/day)	(n = 841)(19–22.1 g/day)	(n = 841) (22.2–25.6 g/day)	(n = 841)(>25.6 g/day)	pb
Age (years)	35.50 ± 7.66	35.95 ± 8.09	36.25 ± 7.55	37.43 ± 8.05	<0.001
Weight (kg)	69.22 ± 13.63	69.14 ± 13.68	67.61 ± 12.57	68.64 ± 12.78	0.05
BMI (kg/m2)	24.70 ± 3.81	24.86 ± 3.89	24.80 ± 3.78	25.25 ± 3.79	0.24
Female (%)	51.7	55.3	61.1	65.0	<0.001
Marital status (%)					0.69
Married	81.5	82.3	80.4	82.6
Single	16.8	16.2	17.3	16.2
Divorced/widow	1.7	1.5	2.3	1.2
Education (%)					0.84
Under diploma	10.6	11.7	13.0	12.9
Diploma	27.5	27.8	26.5	26.0
Above diploma and under master's	53.4	53.5	53.5	53.5
Master's and above	8.5	7.1	6.9	7.6
Household size (%)					0.02
<3	42.7	40.4	36.3	36.3
3–4	46.2	47.4	49.1	50.8
>4	11.1	12.2	14.6	12.9
House possession (%)	56.4	58.7	57.9	60.0	0.06
Diabetes (%)	1.8	1.5	1.8	2.0	0.90
Antidepressant medicationsc (%)	4.5	5.7	5.7	6.3	0.44
Dietary supplement used (%)	28.9	28.1	31.2	31.9	0.27
Smokers (%)	15.5	14.1	12.1	13.5	0.25
Physically activity (%)					0.004
Never	42.3	42.0	39.0	34.4
<1 h/week	24.9	27.8	28.8	26.4
1–3 h/week	22.5	19.4	20.9	24.0
>3 h/week	10.2	10.8	11.3	15.2
Obesee (%)	41.8	43.9	44.7	48.8	0.03

^aAll values are means ± standard deviation (SD), unless indicated.

^bObtained from ANOVA for continuous variables and chi-square test for categorical variables.

^cAntidepressant medications include nortriptyline, amitriptyline or imipramine, fluoxetine, citalopram, fluvoxamine, and sertraline.

^dDietary supplements include iron, calcium, vitamins, and other dietary supplements.

^eBody mass index (BMI) ≥25 kg/m².